Russell McMahon wrote: > Thinking about ECAN (Extra Cheap And Nasty) MODEM ideas. Sounds like a really good application for a low-end dsPIC. You could do a rather high-quality FSK or DPSK modem entirely in software, with just a few passive components to interface the audio to/from the radio. Have you looked at any of the modems used in amateur packet radio? -- Dave Tweed -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist